While attempting to join an XBOX Live! game while playing Frontlines: Fuel of War, you may receive a pop up message alerting you of your NAT (Network Address Translation) setting. You will receive this message if your NAT setting is "Moderate" or "Strict" for Frontlines: Fuel of War.

Devices that perform Moderate or Strict NAT can limit the ability of gamers to find each other, participate in sessions, or hear each other on XBOX Live!. If you're using a router or gateway with a moderate or strict NAT, replace it with an XBOX Live! Compatible device.

Please follow the following link to make sure your home network hardware is "XBOX Live! Supported by Microsoft".
http://www.xbox.com/en-US/support/connecttolive/xbox360/homenetworking/equipment.htm

Depending on the device that connects your XBOX 360 to the Internet, your NAT setting will be one of the following:

Open:
Open NAT means that the port-assignment policy on the device that connects your XBOX 360 to the Internet either is minimal or the device complies to the Universal Plug and Play standard and is enabled. This means you should not encounter any issues that are related to the other NAT setting.

Moderate:
Moderate NAT means that a minimal port-assignment policy is enabled, but the device that connects your XBOX 360 to the Internet is blocking addresses or ports. This means you might encounter issues communicating, hosting or joining games on XBOX Live!.

Strict:
Strict NAT means the port-assignment policy on the device that connects your XBOX 360 to the Internet is strong. This means it’s very likely you’ll encounter issues communicating, hosting or joining games on XBOX Live!.


If you are using the original XBOX 360 blade dashboard, follow these steps to find your NAT type:
  • Power on your XBOX 360 (make sure a game disc is not loaded into the system)
  • From the Dashboard, press right on the D-Pad until you reach the 'System' blade
  • Select the 'Network Settings' option and press the A button
  • Select 'Test XBOX Live! connections' and press the A button

    All of your network settings will be tested. Once complete, your NAT type will be displayed.

    If you are using the updated NXE dashboard, follow these steps to find your NAT type:
  • Power on your XBOX 360 (make sure a game disc is not loaded into the system)
  • From the Dashboard, press down on the D-Pad until the 'My XBOX' is selected on the top menu
  • Press right on the D-Pad until the 'System Settings' item is displayed and press the A button
  • Select the 'Network Settings' option and press the A button
  • Select 'Test XBOX Live! connections' and press the A button

    If your NAT type is not 'Open', you will receive a error message at the end of the test. Choosing to display 'More Info' will display your current NAT type with some additional troubleshooting information.

    How does this affect the multiplayer functions of Frontlines: Fuel of War?:
    If your XBOX 360 is connected to a device that reports your connection as Open, you can rest assured that you will not have a problem either hosting a Frontlines: Fuel of War game on your XBOX 360 or joining one from the in-game lobby or via invite. You will also not have any issues with communication with other Open NAT users.

    If it's reported that your connection is Moderate or Strict, you may have difficulty with communication, hosting or joining games.

    To change your NAT setting, you will want to consult the manufacturer of the device that connects your XBOX 360 to the Internet or contact your Internet Service Provider. Also please refer to the Microsoft site listed above to ensure you have an XBOX Live! compatible device.